package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone))
        { //2.如果不符合,返回错误信息
            return Result.fail("手机号格式错误");
        }
        //3.符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4.保存验证码到redis 并设置有效期为2min
        stringRedisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY +phone,code,RedisConstants.LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //发送验证码
        log.debug("发送短信验证码成功,验证码:{}",code);
        //5.返回ok
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(loginForm.getPhone()))
        {
            return Result.fail("手机号格式错误");
        }
        //2.校验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY + loginForm.getPhone());
        String code= loginForm.getCode();
        if(!cacheCode.equals(code)||cacheCode==null)
        { //3.不一致报错
                 return Result.fail("验证码错误");
        }

        //4.一致 根据手机号查询用户
        User user = query().eq("phone", loginForm.getPhone()).one();
        //5.判断用户是否存在
        if(user==null)
        { //6.不存在 创建新用户并保存
          user= createUserWithPhone(loginForm.getPhone());
        }

        //7.保存用户信息到redis
        //7.1生成token 作为登录令牌
        String token = UUID.randomUUID().toString(true);
        //7.2将User对象转为Hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create().
                setIgnoreNullValue(true).setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString() ));
        //7.3存储
        stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY+token,userMap);
        //7.4设置token有效期
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token,RedisConstants.LOGIN_USER_TTL,TimeUnit.MINUTES);
        //8.返回token
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName("user_"+RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
